Answer:
That could depend on how many LAR entries you filed. If the loan you missed was only one and 500 loans were reported, that's an error rate of only 0.2% (assuming full accuracy on the LAR entries submitted). On the other hand, if you only filed 100 entries, that percentage is multiplies 5-fold, to 1.0%.
To be sure, contact your lead federal examiner and pose the question there.